Executive Change · Reg FD Disclosure

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549     Form 8-K     CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 12, 2026     CARPENTER TECHNOLOGY CORPORATION (Exact name of registrant as specified in its charter)       Delaware   1-5828   23-0458500 (State of or other jurisdiction of incorporation)   (Commission File Number)   (IRS Employer I.D. No.)   1735 Market Street   Philadelphia , Pennsylvania   19103 (Address of principal executive offices)   (Zip Code) (610) 208-2000 Registrant’s telephone number, including area code     Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:   ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)   ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)   ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))   ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered or required to be registered pursuant to Section 12(b) of the Act:   Title of each class   Trading Symbol   Name of each exchange on which registered Common Stock, $5 Par Value   CRS   New York Stock Exchange Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b.2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐       Item 5.02 - Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On February 12, 2026, Tony R. Thene notified Carpenter Technology Corporation (the “Company”) of his resignation from the position of Chief Executive Officer of the Company, effective July 1, 2026 (the “Transition Date”). On February 12, 2026, the Board of Directors (the “Board”) of the Company (i) appointed Brian Malloy, the current President and Chief Operating Officer of the Company, to the position of President and Chief Executive Officer of the Company, effective on the Transition Date and (ii) appointed Mr. Thene to the position of Executive Chairman of the Board, effective on the Transition Date. Biographical and other information about Mr. Malloy is included in the Company’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission on August 12, 2025 and the Company’s definitive proxy statement on Schedule 14A filed with the U.S. Securities and Exchange Commission on September 12, 2025. Mr. Malloy does not have any family relationships with any director or executive officer of the Company, and there are no arrangements or understandings between Mr. Malloy and any other persons pursuant to which Mr. Malloy was selected to his position. Neither Mr. Malloy nor any related person of Mr. Malloy has a direct or indirect material interest in any existing or currently proposed transaction to which the Company is or may become a party that would require disclosure under Item 404(a) of Regulation S-K promulgated under the Securities Exchange Act of 1934, as amended. Item 7.01 – Regulation FD Disclosure. A copy of the press release announcing these changes is furnished as Exhibit 99.1 to this Current Report on Form 8-K. The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. The information in Item 7.01 and in Exhibit 99.1 shall not be incorporated by reference into any registration statement or other document filed with the Securities and Exchange Commission by the Company, whether before or after the date hereof, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing. Item 9.01 - Financial Statements and Exhibits. (d) Exhibits   Exhibit No.    Description 99.1    Press Release dated February 17, 2026 104    Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)   SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.   CARPENTER TECHNOLOGY CORPORATION By   /s/ Timothy Lain     Timothy Lain     Senior Vice President and Chief Financial Officer Date: February 17, 2026